ExamAdept

This statesman, politican, scholar, inventor, and one of early presidents of USA invented the swivel chair, the spherical sundial, the moldboard plow, and the cipher wheel.

A:

George Washington

B:

Alexander Hamilton

C:

John Adams

D:

Thomas Jefferson

Answer: D

Thomas Jefferson (April 13, 1743 - July 4, 1826) was the third President of the United States (1801-1809) and the principal author of the Declaration of Independence (1776).

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What Galileo invented?

A:

Barometer

B:

Pendulum clock

C:

Microscope

D:

Thermometer

Answer: D

Various authors have credited the invention of the thermometer to Cornelius Drebbel, Robert Fludd, Galileo Galilei or Santorio Santorio. The thermometer was not a single invention, however, but a development.

Galileo Galilei also discovered that objects (glass spheres filled with aqueous alcohol) of slightly different densities would rise and fall, which is nowadays the principle of the Galileo thermometer (shown). Today such thermometers are calibrated to a temperature scale.

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What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes?

A:

Charles Richter

B:

Hiram Walker

C:

Giuseppe Mercalli

D:

Joshua Rumble

Answer: A

Richter was born on an Ohio farm in 1900. He died in 1985.

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When was barb wire patented?

A:

1874

B:

1840

C:

1895

D:

1900

Answer: A

Joseph F. Glidden was born in New York on Jan. 18, 1812. He invented barbed wire in 1873 and was granted the patent on Nov. 24, 1874. After a three year battle over the patent, which he eventually won, Gidden became known as the "Father of Barbed Wire".

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Which scientist discovered the radioactive element radium?

A:

Isaac Newton

B:

Albert Einstein

C:

Benjamin Franklin

D:

Marie Curie

Answer: D

No answer description is available. Let's discuss.

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Questions for: Inventions